<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
	
	//'asdads' -> String
	//['1','2',1] -> Array
	//function c(){} Function

	String.prototype.zhangruixi = function(){
		//alert('wangyuechao');
		alert(this);
	};

	Array.prototype.zhangrui = function(){
		//alert('pengyan');
		//alert(this)
		return this.slice(1,2);
	};


	Function.prototype.zhangruixi = function(){
		return 10;
	};

	Object.prototype.k = function(){
		alert(10);
	};
	//''.k();
	//{}.k();
	//true.k();
	//null.k();
	//1.k();
	//var a = 1;
	//a.k();
	//false.k();
	//var a = {};
	//a.k();
	//var a = null;
	//a.k();
	//	alert(setTimeout.zhangruixi());
	//alert(alert.constructor)
	//alert.zhangruixi()

	//alert([1,2,3].zhangrui());

	//'asda'.zhangruixi();
</script>
</body>
</html>